#ifndef ITEM_ROW_INCLUDED
#define ITEM_ROW_INCLUDED

/* Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software Foundation,
   51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA */

class Item_row: public Item
{
    Item **items;
    table_map used_tables_cache, not_null_tables_cache;
    uint arg_count;
    bool const_item_cache;
    bool with_null;
public:
    Item_row(List<Item> &);
    Item_row(Item_row *item):
        Item(),
        items(item->items),
        used_tables_cache(item->used_tables_cache),
        not_null_tables_cache(0),
        arg_count(item->arg_count),
        const_item_cache(item->const_item_cache),
        with_null(0)
    {}

    enum Type type() const
    {
        return ROW_ITEM;
    };
    void illegal_method_call(const char *);
    bool is_null()
    {
        return null_value;
    }
    void make_field(Send_field *)
    {
        illegal_method_call((const char *)"make_field");
    };
    double val_real()
    {
        illegal_method_call((const char *)"val");
        return 0;
    };
    longlong val_int()
    {
        illegal_method_call((const char *)"val_int");
        return 0;
    };
    String *val_str(String *)
    {
        illegal_method_call((const char *)"val_str");
        return 0;
    };
    my_decimal *val_decimal(my_decimal *)
    {
        illegal_method_call((const char *)"val_decimal");
        return 0;
    };
    bool get_date(MYSQL_TIME *ltime, uint fuzzydate)
    {
        illegal_method_call((const char *) "get_date");
        return true;
    }
    bool get_time(MYSQL_TIME *ltime)
    {
        illegal_method_call((const char *) "get_time");
        return true;
    }

    bool fix_fields(THD *thd, Item **ref);
    void fix_after_pullout(st_select_lex *parent_select,
                           st_select_lex *removed_select);
    void cleanup();
    void split_sum_func(THD *thd, Ref_ptr_array ref_pointer_array,
                        List<Item> &fields);
    table_map used_tables() const
    {
        return used_tables_cache;
    };
    bool const_item() const
    {
        return const_item_cache;
    };
    enum Item_result result_type() const
    {
        return ROW_RESULT;
    }
    void update_used_tables();
    table_map not_null_tables() const
    {
        return not_null_tables_cache;
    }
    virtual void print(String *str, enum_query_type query_type);

    bool walk(Item_processor processor, bool walk_subquery, uchar *arg);
    Item *transform(Item_transformer transformer, uchar *arg);

    uint cols()
    {
        return arg_count;
    }
    Item *element_index(uint i)
    {
        return items[i];
    }
    Item **addr(uint i)
    {
        return items + i;
    }
    bool check_cols(uint c);
    bool null_inside()
    {
        return with_null;
    };
    void bring_value();
};

#endif /* ITEM_ROW_INCLUDED */
